Method of making binding posts



Jan. 2, 1923.

INVENTOR 0s @arflSmffir BY Hi 5 ATTORNEYS 440,843. 0. A. SMITH.-

METHOD OF MAKING BIN POSTS. FILED DEC.16, 1

Patented Jan. 2 1923.

than

OSCAR AUGUST SMITH, OE CLEVELAND, OHIO, ASSIGNOB 0F ONE-HALF T0 WILLIAM R.

MITCHELL, OF CLEVELAND, OHIO.

I Mn'rrron or MAKING BINDING ros'rs.

Original application filed August 2, 1919, Serial No. 314,885. Divided and this application fi1er1 Decemi ber 16, 1920. Serial No. 431,245.

T 0 all whom it may concern Be it known that 1, Oscar: A. SMITH, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Methods of Making Binding Posts, of'which the follow ing is a specification.

This invention relates to the method of makin binding posts adapted for use with the caroons of batteries, the object of the invention being to provide an improved method of making binding posts adapted for the attachment of electrical conductors or wires to the carbon of a battery and the present application is adivision of my copending application for binding posts Serial No. 314,885 filed Aug, 2,1919.

1 am aware of the patent of E. G. Henn 813,093 of Feb. 20, 1903, in which the post is provided with a circular series of longitudinally extending ribs located around the shank of the post, but in practice I found that these posts frequently tend to split the carbon, having had considerable to do with the making of the post described in said patent and also found that they were expensive to make. r

In the drawings accompanying and forming a part of this specification Fig. 1 illustrates a piece of stock out tothe desired length to form the post; Fig. 2 illustrates the stock threaded at one end for the reception of the terminal nut; Fig. 3 illustrates the punched washer in position against the thread; Figs. 4: and 5 illustrate forms of dies which may be used in forming this post; Fig. 6 illustrates a completed post; Fig. 7 illustrates the punched washer; and Fig. 8 is a perspective view of the completed post.

Similar characters of references indicate corresponding parts in the several figures of the drawings.

The stock 2 cut to the desired. size is provided at one end with a suitable thread for the reception of the terminal nut ,and upon this post is a suitable flange 4c, shown in the present instance a punched washer. The post is then placed between a pair of meeting dies 5 and 6 each provided with a substantially semi-circular recess 7 formed to fit the curved surface of the stock, one portion of which however is of smaller radius (see dotted lines 8), to stamp and form the metal and which portion of smaller radius terminates in a beveled portion 9 forming a V-shaped recess 10 when the die members are brought together. By this means when the binding post is placed between the meetmg dies and pressure exerted upon the post through the dies a tin 9 is "formed at one.

side thereof, which is suflicient to prevent the turning of the post within the carbon while at the same time the post may be forced into a suitable drilled opening of the carbon without the liability of splitting the carbon as heretofore, especially as this fin is of a V-shaped formation and therefore formed with a relatively sharp cutting edge as it were, owing to the V-shaped recess 10 of the dies so that it tends tocut its way into the carbon and thus prevents the splitting thereof.

' It will be seen therefore that by virtue of the present improved method I am enabled to provide the binding post with a rib or projection wherein the metal is forced or projected outwardly and shaped into wedge or tapered form or so as to have substantially a cutting edge designed to facilitate the forcing of the'posts into the carbon of the battery cell. In the present instance mechanism is shown by way of example for carrying out my improved method and a part of the stock is thereby subjected totransverse wedging pressure in order to form a wedge projection, the metal in this instance being projected outwardly and pressed or forced into a tapered or wedge form. Of course any other suitable mechanism may be used for carrying out this improved method, an important feature thereof. being to force a portion of the metal outwardly and also form substantially a cutting edge or a tapered face or a wedge formation.

That part of each die member having the smaller radius or built on portion 8, may have this gradually formed and extending over about 90 of each member if preferred, thus owing to this difference in radii, the metal of the post will be subjected to greater pressure at the parts having the smaller radius thereby to squeeze the metal into the V-shaped recess throughout substantially the length of the smooth portion of the post.

I t will be observed that as hereinbetore statech-the provisionoii the threads form a shoulder for the punched washer to rest against While thelongitudinally extending pro ect-iced also :lorms a shoulder against the Washer after the same is in place to-prevent the dislocation thereof.

The various details maybe" more'or less changed without depa1'ti11gtron1 thespirit or scope of this invention.

I claim my invention:

1. The method of making a carbon binding post having a smooth portion Whichconsists in subjecting substantially the major partof the length oi -said smooth portion to transverse \vedgingipressure thereby to form a longitudinally extending Wedge projec- 9 2. The method of making a binding post )WhlCll consists insub-jecting-apart of said post totransverse pressure inorder to project a. portion of the metal thereof outwardly, and then shaping such projecting portion int-o substantially a cutting edge.

3.'The method of making; a carbon binding post which consists in subjecting apart of saidv post to transverse pressure, greater atone partotthe circumference of the post thaniat another part of such circumference to storm aprojection, and shaping said projection into Wedge form.

4. The method. ofimakinga. binding post which consists'in subjecting a part of said post to transverse pressure in .order. to pro ject a portion of the metal the-reotsoub wardly, and. forcing such projecting portion into tapered form.

5; .Theimethod of makingabinding-post ,Which consists in subjecting a part of said post to wedging action'or pressure in order to project a portion of the metal thereof outwaxrclly into wedge form. I

6. The method'of making a carbon binding post, having threads at one end and a lGldtlVGly smooth: end throughout the circu'mferenceo'i 'the major portion of such post, which consists in placing such post in a pressure exerting means, and exerting pressure upon the postin order to force a portion of the metal thereof outwardly, and shaping such projecting portion into substantially a cutting-edge. i

7.,The methodof maki'nga b inding post having threads atone end and a relatively smooth end throughout the circumference of'the-major portion of such end, and which consists in placing such smooth portion be tween a pair of dies and exerting pressure through said dies upon the stock in order to form a. longitudinally extending rib, and

also exerting pressure in order to taper 9. The method of making a binding post which consists in forcing a portion ofthe metal th'ereol outwardly, and exerting pressure on a part of said metal to forma ta- 1 p ere d face.

10 The.method;.oiimaking a binding-post which. consists in torcinga portion of the metal thereof. outwardly, and forming a cutting. edge. on said metal.

Signed .at- Cleveland, county of. Cuyaho :a, i

and State offUhio, this-13th day of Y ecember, 1920.

OSCAR AUGUST sM i H. 

